Option-1 "Adalo"

Example https://previewer.adalo.com/

Price: from $750 + around $52 per month for the platform subscription;

Works as an application on mobile and a website;

Option-2 "Custom" - a platform and integration service will be selected for your task

Example: https://storysale.us 

These solutions are ideal for creating an MVP product for testing a business proposal and getting feedback. It is possible to create applications based on the Bubble.io/ or zapier.com platform, integromat (make), bravostudio.app, www.xano.com, airtable.com

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